[#PEM_write_bio_ASN1_stream]
= PEM_write_bio_ASN1_stream
:mrdocs:

Stream‐encode an ASN.1 value as a PEM object, optionally pulling content from `in.`

== Synopsis

Declared in `<openssl/asn1.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
PEM_write_bio_ASN1_stream(
    xref:BIO.adoc[BIO]* out,
    xref:ASN1_VALUE.adoc[ASN1_VALUE]* val,
    xref:BIO.adoc[BIO]* in,
    int flags,
    char const* hdr,
    xref:ASN1_ITEM.adoc[ASN1_ITEM] const* it);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *out*
| BIO that receives the PEM output.
| *val*
| ASN.1 value to encode (not const because streaming may update state).
| *in*
| Optional content BIO for indefinite‐length / streaming payloads, or NULL.
| *flags*
| SMIME/CMS streaming flags (for example SMIME_STREAM).
| *hdr*
| PEM header label such as "CMS" or "PKCS7" (without BEGIN/END).
| *it*
| ASN.1 item descriptor for `val.`
|===


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